DR. LEONARD I ZON MD
NPI 1245299197
Internal Medicine - Hematology & Oncology in Boston, MA
About Dr. Leonard I Zon Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LEONARD I ZON MD (NPI 1245299197) is an individual hematology & oncology provider in Boston, Massachusetts, licensed in Massachusetts (55881) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS and is a graduate of Jefferson Medical College Of Thomas Jefferson University (1983).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Leonard I Zon Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02115
BOSTON, MA 02115
BOSTON, MA 02115
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Leonard Zon's NPI number?
The NPI number for Leonard Zon is 1245299197. It was assigned to this individual provider in the NPPES registry on March 20, 2006.
Where is Leonard Zon located?
Leonard Zon practices at 300 Longwood Ave Research Building Floor 7, Boston, MA 02115. The listed phone number is (617) 919-2069.
What is Leonard Zon's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Leonard Zon enrolled in Medicare?
Yes. Leonard Zon is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does Leonard Zon accept?
Health plans from Anthem Blue Cross and Blue Shield list Leonard Zon as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Leonard Zon was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Leonard I Zon, MD · NPI 1245299197
Hematology & Oncology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since March 20, 2006.
## Identity
- **NPI:** 1245299197 (Entity type: Individual)
- **Enumerated:** March 20, 2006
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 55881 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 LONGWOOD AVE, RESEARCH BUILDING FLOOR 7, Boston, MA 02115-5724
- **Phone:** (617) 919-2069
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Jefferson Medical College Of Thomas Jefferson University, class of 1983
## Record status
- **NPPES last updated:** July 13, 2026
- **Other identifiers:** Medicaid 3069590 (MA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1245299197) · Data from the CMS NPPES public registry.